Letters to Sartre - Simone Beauvoir

These two, right? I can picture them sitting at Café de Flore, sipping an espresso, smoking a ciggie... The story of the famous French existentialists still intrigues; what is it about them, and their alliance, that captivates an audience still? These letters were apparently found later after Beauvoir said they were lost. Q. Has there ever been a duo quite like them before or since? Like new copy, via Paris.